I have had a few over the years. All of the ones I had had an eyebox problem. I admit the last one was probably 10 plus years ago. I actually bought it brand new put it on a rifle , hated the scope soo much that I gave the whole outfit to the next friend who showed at my house. Told them to get it out of the house and I was never buying another Burris again. Hopefully they have that worked out by now. Funny a friend called me last night and said he has some Burris scopes he found in his uncles stuff, ask me if i ever heard of a 4x Mini. I said I heard of a 6x Minis, with AO, but don't think they ever made a 4 power mini. He says he has one in hand. I might go see it, just to see one. We are going way back now, sorry for the rant, this is what old people do,LOL..